Was it? Or was it later only using technology that Section 31 was already using for its own purposes as it didn't quite have what would be available to it in the future. Remember that Leland was ready himself to use the mindsifter on Spock.
Yeah he was, but I think Leland might have been in the dark on what went on during Spock's escape and I feel it was Control who faked the camera footage like we find out later on and would not have been surprised if it was that, that murdered those people during the escape because Leland, I'm sure didn't organize the deaths during the escape or the doctored footage, at least that's what I believe happened.
I'm up to the infamous probe episode now.